Cannula



FIG. 1 is a front, top, and side perspective view of a cannula embodying our new design.

FIG. 2 is a top, back, and side perspective view thereof.

FIG. 3 is a back view thereof.

FIG. 4 is a front view thereof.

FIG. 5 is a side view thereof, the opposite side being a mirror image.

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in the FIGS. 1-3 and 5 illustrate portions of the cannula which form no part of the claimed design. 

CLAIM The ornamental design for a cannula, as shown and described. 